William h



(No Model.)

. W. H. HAIRE.

I WRENCH.

Patented Feb. 13, 1894.-

UNITED STATES PATENT Enron.

WILLIAM H. HAIRE, OF BRISTOL, TENNESSEE, ASSIGNOR TO THE BRISTOL NOVELTYCOMPANY, OF SAME PLACE.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 51 4,459,dated February13, 1894.

Application filed April 19, 1893.

To a ZZ whom it may concern.- 7

Be it known that I, WILLIAM H. HAIRE, a citizen of the United States,residing at Bristol, in the county of Sullivan and State of Tennessee,have invented a new and useful Wrench, of which the following is aspecification.

Myinvention relates to improvements in wrenches for operating upon nuts;the objects in view being to provide a wrench of this class of light,economic, and compact construction; and to so construct the same as toadapt it for a ready coarse adjustment to fit different sized nuts andfor a finer adjustment when so desired.

With these and other objects in view the invention consists in certainfeatures of construction hereinafter specified and particularly pointedout in the claim.

Referring to the drawings:--Figure l is a perspective view of a wrenchembodying my invention. Fig. 2 is a longitudinal sectional view of thesame. Fig. 3 is a front elevation thereof. Fig. 4 is a detail inperspective of the locking pawl. Fig. 5 is an elevation of a portion ofthe feed-shaft and the pawl, the latter being shown in section, and thetwo parts being exaggerated.

Like numerals of reference indicate like parts in all the figures of thedrawings.

In practicing my invention I provide a preferably cast-metal stock 1,the same being shaped at its inner end to form a suitable hand-hold orhandle 2, which for the purpose of lightness is preferably open. Beyondthe handle the stock is reduced to form in crosssection a rectangularshank 3, and said shank from a point near its outer end to a point nearthe handle is provided with a longitudinal slot or recesss, 4, whichadjacent to the handle is bulged in opposite directions as at 5. Betweenthe slot in the handle and the slot in the shank a bearing-wall or block6 is located. The outer end of the shank is provided with the usualfixed head or jaw 7.

In the wall or bearing-block 6 and in the outer end of the slot 4 formedin the shank bearing cavities 8 are formed, and in these bearingcavities take the axial trunnions 9 formed at the opposite ends of athreaded feed-shaft 10. This threaded feed-shaft has erial No. 470.978-(No model.)

located thereon and atits inner end a milled nut 11, and beyond this nutthe threads of the shaft occur. The nut is located between the bulges 5of the side-walls of the shank, which bulges are provided for thispurpose, the diameter of the nut being such that its periphery extendsin front and in rear of the stock. The thread on the shaft iscontinuous, but, as best shown in Fig. 5, has its inner side inclinedand slightly concaved, as indicated at 12, while its outer side or faceis slightly under cut- Mounted for sliding upon the shank 3 is thesleeve 13, the same being provided at its outer end with a movable jaw14, and between the same and its inner end with an opening or slot 15.The opening or slot has its side walls extended, as shown in Fig. 1, andthrough the same and a pawl 16 is passed a pintle 17, whereby the pawlis pivoted within the slot. The outer end of the pawl is reduced, asshown in Figs. 2 and 4, forming a tail-portion 18, and upon its underside is provided at its point with a log 19, between which and thesleeve there is interposed a light coiled-spring 20 which has a tendencyto press the tail of the pawl outward and the inner end of the pawlinward. The inner face of the inner end of the pawl is provided with asegmental thread 21, which corresponds to the thread 12 of thefeed-shaft, that is, is of the same shape though disposed inwardly incontradistinction thereto. When not otherwise influenced it will be seenthat the thread of the pawl will engage with the thread of the shaft,and that by a rotation of the thumb-nut 11 the movable sleeve and itsjaw may be fed to or from the fixed jaw 17, whereby a fine adjustmentmay be secured when desired, as when operating upon nuts of littledifference in proportion. When, however, it is desired to move thesliding jaw to any considerable extent, the same may be pushed outwardtoward the fixed jaw, the inclined faces of the threads of the pawl andthe shaft riding over each other. But on the other hand, when it isdesired to move the sliding jaw inward to any extent the tail 18 of thepawl must be pressed inward against the spring and its thread disengaged with that of the shaft before the slid ing movement can takeplace, and immedi ICO ately upon being released a re-engagement occurs.

As best shown in Fig. 8, it will be seen that the diameter of thefeed-shaft is the same'as the width and depth of the slot in the shank,and that therefore the opposite sides and bottom of the feed-shaft willlightly bear upon the inner faces of the sidewalls and bottom of theslot, so that the feed-shaft is steadied and supported throughout itslength.

From the foregoing description in connection with the accompanyingdrawings it will be seen that I have provided a wrench of simple,economic, and compact construction, the same being capable of a readyadjustment both fine and coarse, and when adjusted being securely lockedagainst slipping.

Various means may be provided for inserting the-feed-rod or screw in thewrench-stock, said means readily suggesting themselves to themanufacturer of the device. As an example of such means I might suggestthat the lower or inner end of the feed-rod or screw may be bored and aspring-pressed pin inserted therein so that after the outer trunnion hasbeen inserted in its position in the outer bearing the spring-pressedpin may be inserted in the inner hearing; or, again, a bearing-screw maybe inserted through the block and into a bearing in the inner end of thefeed-rod, all as will be obvious.

Having described my invention, what I claim is In a wrench, thecombination with a stock shaped at one end to form, and at a pointbeyond the same provided with a slot, and at its outer end with a head,the walls of the slot adjacent to the handle being bulged, a threadedshaft journaled in the ends of the slot, and a milled nut carried by theshaft, of a sleeve mounted upon the shank and provided at its outer endwith a jaw and in rear of the same with an opening, a pawl having aninner threaded face for engaging the shaft, and a spring interposedbetween the outer end of the pawl and the sleeve, substantially asspecified.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of two witnesses.

WILLIAM H. HAIRE.

WVitnesses:

I. B. CHILDERS, J. T. Lu SUEUR.

